Browse Prior Art Database

Stackable Plastic Semiconductor Chip Carrier

IP.com Disclosure Number: IPCOM000043696D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Robock, PV: AUTHOR

Abstract

A stackable plastic semiconductor chip carrier is provided. Alignment is assured by molded bosses on the top surface of the bottom carrier which mate with molded holes in the bottom surface of the top carrier. Peripheral leads are placed so that they align when the carriers are snapped together. The bottom carrier 1, as shown in Fig. 2, is molded with four bosses 3 on the top surface. The top carrier 5, as shown in Fig. 1, is molded with four holes 7 on centers, the same as the four bosses. Each carrier is provided with an appropriate number of leads 9 disposed in an identical pattern around the periphery of the carrier. After a semiconductor chip is mounted within each carrier, the carriers are snapped together. This aligns the leads from the top and bottom carriers.

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Stackable Plastic Semiconductor Chip Carrier

A stackable plastic semiconductor chip carrier is provided. Alignment is assured by molded bosses on the top surface of the bottom carrier which mate with molded holes in the bottom surface of the top carrier. Peripheral leads are placed so that they align when the carriers are snapped together. The bottom carrier 1, as shown in Fig. 2, is molded with four bosses 3 on the top surface. The top carrier 5, as shown in Fig. 1, is molded with four holes 7 on centers, the same as the four bosses. Each carrier is provided with an appropriate number of leads 9 disposed in an identical pattern around the periphery of the carrier. After a semiconductor chip is mounted within each carrier, the carriers are snapped together. This aligns the leads from the top and bottom carriers. The leads are then joined by, for example, soldering with 60/40 tin-lead solder 11. The assembly is then joined to a printed circuit board 13. Since the carriers are held in alignment by the plastic bosses, any softening of the joints 11 will not affect alignment and no fixtures are needed.

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